The month in detail
What to expect in September
Autumn in London is often underrated: 66°F, golden light and declining crowds. An interesting window. Expect rain on 26% of days — a light raincoat in the bag is recommended. Not the best window, but acceptable if dates are constrained. July (7.9/10) is significantly better if possible.
September ranks 4 out of 12 months in London. Compared to August: −5°F daytime, −1.3h of sun per day.
This month's conditions
What it's like in September
UV index
3 · low
no protection needed
Feels like
comfortable
11°
Daylight
12.4h of daylight
Air quality
good
AQI 25
Compare
Is September the right month?
The best month in London is July (7.9/10), 0.5 pt higher than September.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · London
Expedia →
Activities
Tours, tickets, experiences
See ↓
Flights
Multi-airline comparator
Kiwi →
🎟️ Activities & tours · London
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a beach trip.
Country · United Kingdom
🗣️LanguageEnglish
💶CurrencyPound Sterling (£)
🚗DrivingLeft-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘExpensive · 4/5
🌡️ Climate
🌍Climate typeTemperate oceanic
📈Climate trend ⓘ+2.43°F/decade
🔥Hottest monthJuly · 72°F
❄️Coolest monthJanuary · 46°F
🌧️Rainiest month ⓘJanuary · 37%
🏖️ Beach trip
📅Peak seasonJuin → Sept
🏖️Swell (Sept–Mar) ⓘModérée
Explore
Other destinations in September
If September doesn't convince you for this destination, compare with others.
Location
Where is London ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
United KingdomTemperate oceanic climate with a 7.9 → 0.9 gap between best and worst month. 10 years of ERA5 data to choose by project.
51.51°N · 0.13°W
Questions
Frequently asked questions
What is the best time to visit London?
July is the best month with 72°F highs, 57°F lows, 7.0h of sunshine and 25.0% rainy days. The months of July & August offer comparable conditions.
How many hours of sunshine does London get in July?
London averages 7.0 sunshine hours per day in July. It is the sunniest month with a climate score of 7.4/10.
What is the rainiest month in London?
January is the most unfavourable month with January has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in London in July?
In July, overnight lows reach 57°F, while afternoon highs average 72°F.
Is London good in winter?
In winter (December-February), London scores 2.0/10 on average — Difficult period — prefer the peak season.. The best month overall remains July with a score of 7.4/10.
When should you avoid London?
January is the most difficult month to visit London, with January has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Do you need sun protection in London in September?
The average UV index reaches 3 in September in London (low), with about 12.4h of daylight. No protection needed.